High temperature resistant burnout resistant rotary compensator

Abstract

The application discloses a high-temperature-resistant and burn-loss-preventing rotary compensator, which comprises an inner tube and an outer sleeve, one end of the inner tube is inserted into the outer sleeve from one end of the outer sleeve and the inner tube can rotate relative to the outer sleeve, a sealing structure is arranged at the connection position of the inner tube and the outer sleeve, the sealing structure comprises an annular inner boss arranged on the inner surface of the outer sleeve, sealing packing arranged on the inner tube and a pressing flange arranged on the inner tube, a sealing cavity is formed among the annular inner boss, the outer sleeve and the inner tube, and the sealing compensator further comprises a sealing cover arranged on one end of the sealing packing away from the annular inner boss and used for being in contact with the pressing flange to seal the sealing packing in the sealing cavity. The application has the beneficial effects that the end cover is arranged to separate the sealing packing from air, the sealing packing will not be burned at high temperature because of no contact with oxygen, the sealing property is improved, and the service life of the rotary compensator product is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of rotary compensators, in particular to a kind of high-temperature-resistant burnout-resistant rotary compensators. BACKGROUND

[0002] Power, oil, chemical industry, pipeline in heat industry generally needs to install and use compensation device, the sealing structure of existing rotary compensator generally includes the inner boss of setting in the inner surface of outer sleeve, the outer boss of setting on the outer surface of inner tube, the sealing ring of being set on inner tube and being located between inner boss and outer boss and the sealing packing of graphite material of being set on inner tube, the setting of sealing ring is only to further enhance sealing effect, actually as long as sealing packing sealing performance is good, sealing ring is unnecessary to set, the sealing packing of prior art extends into outer sleeve, one end of sealing packing is against inner boss, the other end is provided with axial thrust to it by compression flange, sealing packing is compressed in outer sleeve, the sealing structure of existing rotary compensator, since the one end of sealing packing and compression flange meets, except the part of meeting compression flange, the rest is exposed to air, when the temperature of medium in inner tube rises, the temperature of sealing packing rises along with it, the part of graphite material sealing packing exposed to air will be burned out at this time, with the long-time use of rotary compensator, the more sealing packing is burned out, the smaller its length is, the sealing will gradually become poor, the durability of sealing packing sealing is poor, leading to the service life reduction of rotary compensator product. SUMMARY

[0003] The purpose of the present application is to provide a kind of high-temperature-resistant burnout-resistant rotary compensator, solve the technical defects that sealing packing of rotary compensator in prior art is easy to be burned out and affect sealing performance.

[0004] To solve the above problems, the technical scheme adopted by the present application is: high-temperature-resistant burnout-resistant rotary compensator, including inner tube and outer sleeve, one end of inner tube extends into outer sleeve and inner tube can rotate relative to outer sleeve, sealing structure is arranged between inner tube and outer sleeve, the sealing structure includes annular inner boss of setting in the inner surface of outer sleeve, sealing packing of being set on inner tube and compression flange of being set on inner tube, annular inner boss, outer sleeve and inner tube form sealing cavity, compression flange is used to compress sealing packing in sealing cavity, further including sealing cover of being set on inner tube, the sealing cover is arranged between sealing packing and compression flange, for sealing sealing packing in sealing cavity. The present application sets sealing cover, isolates sealing packing from air, avoids sealing packing from being burned out and failure by contacting oxygen under high temperature, improves the durability of sealing packing sealing, thereby greatly improves the service life of entire rotary compensator.

[0005] As a further improvement of the present application, the sealing cover is annular. The sealing cover in the present application is located in the sealing cavity and is in close contact with the inner surface of the outer sleeve and the outer surface of the inner tube, so that air cannot contact the sealing filler through the sealing cover, thereby achieving the purpose of isolating oxygen.

[0006] As a further improvement of the present application, the side of the sealing cover adjacent to the sealing filler is concave to form an annular groove for facilitating the extension of the sealing filler. The end of the sealing filler in the present application extends into the annular groove, and the end of the sealing filler is wrapped by the sealing sheet, which further prevents the sealing filler from contacting oxygen and being burned, thereby further improving the service life of the product.

[0007] As a further improvement of the present application, the sealing filler comprises a plurality of sealing units that are connected to each other; the ends of the two adjacent sealing units that face each other are in close contact, and the end of the sealing unit farthest from the annular inner boss extends into the fixing cavity. The sealing filler in the present application is composed of a plurality of sealing units, so that when one sealing unit is damaged, only the damaged sealing unit needs to be replaced, without the need for complete replacement, which is economical.

[0008] As a further improvement of the present application, the inner surface of the annular inner boss is provided with a taper, the inner diameter of the end of the annular inner boss close to the sealing filler is smaller than the inner diameter of the other end, and correspondingly, the outer surface of the inner tube is provided with a taper matched with the inner surface of the annular inner boss. An annular sealing groove is formed on the inner surface of the annular inner boss, and a first sealing ring is arranged in the annular sealing groove. In the present application, the taper matched with the annular inner boss is arranged on the inner tube, and when the rotary compensator bears internal pressure, the first sealing ring deforms under pressure, which can eliminate the machining error of the rotary compensator, isolate the medium in the rotary compensator from the sealing filler, effectively isolate the components in the medium that react with the sealing filler, and further improve the service life of the sealing filler.

[0009] As a further improvement of the present application, the end of the annular inner boss away from the sealing filler forms an annular notch, the outer surface of the end of the inner tube extending into the outer sleeve is provided with an annular outer boss, a second sealing ring is arranged on the inner tube, and the annular outer boss surrounds the second sealing ring in the annular notch. The present application arranges the second sealing ring, further improves the sealing effect of the present application, avoids the contact between the medium in the rotary compensator and the sealing filler, and opens the annular notch to facilitate the installation of the second sealing ring.

[0010] As a further improvement of the present application, the inner surface of the annular notch of the annular inner boss is provided with an annular sharp groove with a V-shaped cross section. The present application arranges the annular sharp groove, and when the annular outer boss extrudes the second sealing ring, the second sealing ring is deformed and extruded into the annular sharp groove to be fixed as a whole with the outer sleeve, thereby further improving the sealing performance.

[0011] As a further improvement of the present application, the annular outer boss is provided with an annular protrusion with a semicircular cross section on the surface matched with the annular inner boss, and the annular protrusion is in contact with the inner boss. The present application is provided with the annular protrusion, and since the cross section of the annular protrusion is semicircular, the annular protrusion is in linear contact with the inner boss, reducing the friction when the outer sleeve and the inner tube rotate, and the matching of the annular protrusion and the inner boss also has a certain sealing property, which further separates the medium and the sealing packing.

[0012] As a further improvement of the present application, the pressing flange comprises a flange plate and a pressing ring, the pressing ring is sleeved on the inner tube, one end of the pressing ring extends into the outer sleeve for pushing the sealing cover towards the sealing packing, the other end of the pressing ring is connected with the flange plate, and the end of the outer sleeve is provided with a fixing flange which is detachably connected with the flange plate. The present application adopts the flange connection, the pressing ring is pushed by the connecting flange, the pressing ring presses the end cover, and the sealing packing is sealed in the sealing cavity.

[0013] In summary, the present application has the beneficial effects that: the present application adopts the mode of setting the end cover to separate the sealing packing and the air, so that the sealing packing will not burn out at high temperature because of no contact with oxygen, the sealing property is improved, and the service life of the rotary compensator product is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present application.

[0015] Figure 2 is Figure 1 is a partial enlarged view of A in FIG. 1.

[0016] Figure 3 is Figure 2 is a partial enlarged view of B in FIG. 1.

[0017] Figure 4 is a three-dimensional structural schematic diagram reflecting the sealing cover in embodiment 1.

[0018] Figure 5 is a three-dimensional structural schematic diagram reflecting the sealing cover in embodiment 2.

[0019] Figure 6 is a sectional view reflecting the sealing cover in embodiment 2.

[0020] Wherein: 1, inner tube; 2, outer sleeve; 3, annular inner boss; 4, sealing packing; 5, pressing flange; 6, sealing cover; 10, sealing unit; 11, first sealing ring; 12, annular outer boss; 13, second sealing ring; 14, annular sharp groove; 15, annular protrusion; 16, flange plate; 17, pressing ring; 18, fixing flange; 19, bolt; 20, nut. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 and Figure 2 The high-temperature resistant, burn-proof rotary compensator shown includes an inner tube 1 and an outer tube 2. One end of the inner tube 1 extends into the outer tube 2 from one end of the outer tube 2, and the inner tube 1 can rotate relative to the outer tube 2. A sealing structure is provided between the inner tube 1 and the outer tube 2. The sealing structure includes an annular inner boss 3 on the inner surface of the outer tube 2, a sealing packing 4 sleeved on the inner tube 1, and a clamping flange 5 sleeved on the inner tube 1. The end of the inner tube 1 located inside the outer tube 2 passes through the annular inner boss 3. An annular sealing cavity is formed between the annular inner boss 3, the outer tube 2, and the inner tube 1. The clamping flange... 5 is used to press the sealing packing 4 into the sealing cavity, so that the end face of the sealing packing 4 near the annular inner boss 3 is in contact with the annular inner boss 3. In order to isolate the sealing packing 4 from oxygen in the air and prevent the sealing packing 4 from being burned, a sealing cover 6 is provided in this embodiment. The sealing cover 6 in this embodiment is made of stainless steel. When in use, the sealing cover 6 is sleeved on the inner tube 1, and the sealing cover 6 is located between the sealing packing 4 and the pressing flange 5 (that is, the sealing cover 6 is located on the sealing packing 4 at the end away from the annular inner boss 3), so as to seal the sealing packing 4 in the sealing cavity.

[0024] In this embodiment, the sealing cap 6 is annular, such as Figure 4 As shown, the outer diameter of the sealing cap 6 is equal to the inner diameter of the outer sleeve 2 and the outer diameter is equal to the outer diameter of the inner tube 1. In use, the sealing piece 7 is located in the sealing cavity, and its end face near the annular inner boss 3 is in contact with the end face of the sealing packing 4 away from the annular inner boss 3. The outer surface and inner surface of the sealing piece 7 are in contact with the inner surface of the outer sleeve 2 and the outer surface of the inner tube 1, respectively, so that air cannot pass through the sealing piece 7 and come into contact with the sealing packing, thereby achieving the purpose of isolating oxygen.

[0025] The compression flange 5 in the embodiment comprises a flange plate 16 and a compression ring 17, wherein the outer diameter of the compression ring 17 is less than or equal to the inner diameter of the outer sleeve 2, the compression ring 17 is sleeved on the inner tube 1, one end of the compression ring 17 extends into the outer sleeve 2 for pushing the sealing sheet 7 towards the sealing filler 4, and the end face of the other end of the compression ring 17 is in abutment with the flange face of the flange plate 16. In the embodiment, a fixed flange 18 coaxial with the outer sleeve 2 is arranged at the end of the outer sleeve 2, and the fixed flange 18 is detachably connected with the flange plate 16. In the embodiment, a plurality of bolts 19 and nuts 20 threadedly matched with the bolts 19 are used to detachably connect the fixed flange 18 with the flange plate 16. In the embodiment, the inner diameter of the flange plate 16 is greater than or equal to the outer diameter of the inner tube 1, and preferably, the inner diameter of the flange plate 16 is slightly greater than the outer diameter of the inner tube 1. The end face of the end of the compression ring 17 away from the sealing cover 6 is in abutment with the side surface of the flange plate 16 close to the outer sleeve 2. The flange plate 16 is connected with the fixed flange 18 by the bolts 19, and the flange plate 16 extrudes the compression ring 17 towards the sealing cover 6, the sealing cover 6 is pushed by the compression ring 17, the sealing filler 4 is enclosed in the sealing cavity and separated from oxygen in the air.

[0026] Embodiment 2

[0027] Compared with the embodiment 1, in the embodiment, the side of the sealing cover 6 adjacent to the sealing filler 4 is concave to form an annular groove for facilitating the extension of the sealing filler 4, as shown in Figure 5 and Figure 6 The end of the sealing filler 4 away from the annular inner boss 3 extends into the annular groove, and in the use state, the sealing cover 6 wraps the outer surface, the inner surface and the end face of the end of the sealing filler 4 away from the annular inner boss 3, further preventing air from entering the sealing cavity. The rest of the structure in the embodiment is the same as that in the embodiment 1, and will not be described herein.

[0028] Embodiment 3

[0029] The embodiment is a further improvement based on the embodiment 2. Compared with the embodiment 1, the sealing filler 4 in the embodiment comprises a plurality of sealing units 10 in abutment with each other, the ends of the two adjacent sealing units 10 close to each other are in close abutment, and the end of the sealing unit 10 farthest from the annular inner boss 3 extends into and is clamped in the fixed cavity by the inner fixed ring 8 and the outer fixed ring 9. The rest of the structure in the embodiment is the same as that in the embodiment 2, and can be referred to the embodiment 2, and will not be described herein.

[0030] Embodiment 4

[0031] The embodiment is further improved on the basis of embodiment 3. Compared with embodiment 3, the inner surface of the annular inner boss 3 is provided with a taper, the inner diameter of the annular inner boss 3 close to the sealing filler 4 is smaller than the inner diameter of the annular inner boss 3 far from the sealing filler 4, the outer surface of the inner tube 1 is provided with a taper matched with the inner surface of the annular inner boss 3, and the annular sealing groove is formed on the inner surface of the annular inner boss 3. The first sealing ring 11 is arranged in the annular sealing groove, which separates the two sides of the first sealing ring 11, so that the medium in the rotating compensator cannot contact the sealing filler 4 through the first sealing ring 11, thereby avoiding the reaction of the medium and the sealing filler 4 and the corrosion of the sealing filler 4, and further improving the continuity of the sealing of the sealing filler 4. The first sealing ring 11 in the embodiment is preferably made of red copper. When the rotating compensator bears internal pressure, the inner tube 1 and the annular inner boss 3 extrude the first sealing ring 11, so that the first sealing ring 11 is extruded and deformed, which effectively eliminates the processing error of the first sealing ring 11 and improves the sealing performance of the rotating compensator. The rest of the structure of the embodiment is the same as that of embodiment 3, and details can be referred to embodiment 3, which will not be described here.

[0032] At the same time, the sealing performance is improved. The rest of the structure of the embodiment is the same as that of embodiment 3, and details can be referred to embodiment 3, which will not be described here.

[0033] Embodiment 5

[0034] The embodiment is further improved on the basis of embodiment 4. Compared with embodiment 4, in order to further isolate the medium in the rotating compensator and the sealing filler 4, the annular inner boss 3 is formed with an annular notch far from the sealing filler 4, the outer surface of the end of the inner tube 1 extending into the outer sleeve 2 is provided with an annular outer boss 12, the second sealing ring 13 is arranged on the inner tube 1, and the annular outer boss 12 surrounds the second sealing ring 13 in the annular notch.

[0035] The annular sharp groove 14 with a V-shaped cross section is formed on the inner surface of the annular notch of the annular inner boss 3, as shown in the figure. The second sealing ring 13 is preferably made of red copper. When the annular outer boss 12 extrudes the second sealing ring 13, the second sealing ring 13 is deformed to fill the annular sharp groove 14 and is fixed in the annular notch. The rest of the structure of the embodiment is the same as that of embodiment 4, and details can be referred to embodiment 4, which will not be described here. Figure 3

[0036] Embodiment 6

[0037] ​The present embodiment is a further improvement of the embodiment 5, compared with the embodiment 5, the present embodiment is provided with a semicircular annular protrusion 15 on the surface of the annular outer boss 12 used for cooperating with the annular inner boss 3, the annular protrusion 15 is coaxial with the inner tube 1, the annular protrusion 15 is in contact with the annular inner boss 3, wherein the annular protrusion 15 is in line contact with the annular inner boss 3, when the inner tube 1 and the outer sleeve 2 rotate relatively, the friction between the annular inner boss 3 and the annular outer boss 12 is small, when the annular protrusion 15 is in contact with the annular inner boss 3, the two itself also has sealing property, so that the sealing property of the whole of the present embodiment is better. The rest of the structure of the present embodiment is the same as that of the embodiment 5, and can refer to the embodiment 5 for details, and the present embodiment will not be described here.

[0038] The parts not particularly mentioned in the above description are all prior art, or can be realized by the prior art. Moreover, the specific implementation cases described in the present application are only the preferred implementation cases of the present application, and are not intended to limit the implementation scope of the present application. That is, equivalent changes and modifications made according to the content of the patent scope of the present application should be regarded as the technical scope of the present application.

Claims

1. A high-temperature resistant, burn-proof rotary compensator, comprising an inner tube and an outer tube, one end of which extends into the outer tube and is rotatable relative to the outer tube. A sealing structure is provided between the inner tube and the outer tube, comprising an annular inner boss on the inner surface of the outer tube, sealing packing sleeved on the inner tube, and a clamping flange sleeved on the inner tube. A sealing cavity is formed between the annular inner boss, the outer tube, and the inner tube. The clamping flange is used to press the sealing packing into the sealing cavity. Its features are: It also includes a sealing cap fitted onto the inner tube, which is positioned between the sealing packing and the compression flange to seal the sealing packing within the sealing cavity; The sealing packing consists of multiple sealing units that are connected to each other; An annular inner boss forms an annular notch at the end away from the sealing packing. An annular outer boss is provided on the outer surface of the end of the inner tube that extends into the outer tube. A second sealing ring is fitted on the inner tube. The annular outer boss surrounds the second sealing ring within the annular notch. The inner surface of the annular notch of the inner annular boss has an annular pointed groove with a V-shaped cross section. The second sealing ring is made of copper. When the outer annular boss compresses the second sealing ring, the second sealing ring deforms and fills the annular pointed groove and is fixed in the annular notch. The outer annular boss has an annular protrusion with a semi-circular cross-section on its surface that mates with the inner annular boss. The annular protrusion contacts the inner annular boss. The inner surface of the annular inner boss is tapered, and the inner diameter of the end of the annular inner boss near the sealing packing is smaller than the inner diameter of the other end. Correspondingly, the outer surface of the inner tube is tapered to match the inner surface of the annular inner boss. An annular sealing groove is opened on the inner surface of the annular inner boss, and a first sealing ring is placed in the annular sealing groove. The first sealing ring is made of copper. The inner tube and the annular inner boss squeeze the first sealing ring, causing the first sealing ring to deform.

2. The high-temperature resistant, burn-proof rotary compensator according to claim 1, characterized in that: The sealing cap is ring-shaped.

3. The high-temperature resistant, burn-proof rotary compensator according to claim 1, characterized in that: The sealing cap is recessed on the side adjacent to the sealing packing to form an annular groove that facilitates the insertion of the sealing packing.

4. The high-temperature resistant, burn-proof rotary compensator according to any one of claims 1 to 3, characterized in that: The clamping flange includes a flange and a clamping ring. The clamping ring is fitted onto the inner tube, with one end extending into the outer tube to push the sealing cap toward the sealing packing. The other end of the clamping ring is connected to the flange. A fixed flange is provided at the end of the outer tube, and the fixed flange is detachably connected to the flange.

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